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CVE-2015-8631

19
FAUCET Score

CVE-2015-8631 describes multiple memory leaks in the kadmind component of MIT Kerberos 5, affecting versions before 1.13.4 and 1.14.x before 1.14.1, as well as various Linux distributions like Debian, OpenSUSE, Oracle, and Red Hat. This vulnerability allows remote authenticated users to trigger a denial of service by causing excessive memory consumption through requests with NULL principal names. Rated Medium (CVSS 6.5), it requires low privileges and network access, with a high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.13.4CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
>= 1.14, < 1.14.1CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.64%
Probability of exploitation in next 30 days
EPSS Percentile
90.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0464 is in the 97th percentile among its peer group of 21,974 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: krb5-0:1.10.3-42z1.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: krb5-0:1.13.2-12.el7_2
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: krb5

Vendor Advisories (1)

redhatCVE-2015-8631Moderate

krb5: Memory leak caused by supplying a null principal name in request

Jan 8, 2016

References

krbdev.mit.edu / rt/Ticket/Display.html
Vendor Advisory
lists.opensuse.org / opensuse-updates/2016-02/msg00059.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2016-02/msg00110.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2016-0493.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-0532.html
Third Party Advisory
github.com / krb5/krb5/commit/83ed75feba32e46f736fcce0d96a0445f29b96c2
PatchThird Party Advisory
debian.org / security/2016/dsa-3466
Third Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html
Third Party Advisory
securitytracker.com / id/1034916
Third Party AdvisoryVDB Entry